You can implement such code in a 1C:Enterprise add-in for Android and then use this add-in when building your Android app for 1C:Enterprise mobile platform via mobile application builder. For the add-in, in the ANDROID_MANIFEST_EXTENSIONS.XML file, you should specify:

The point is that you use the add-in technology to create a separate add-in for your application.

The add-in includes the functionality you cannot implement in your 1C:Enterprise application' code directly.

In general, you can create add-ins by using the Native API or COM technology; for mobile applications, you use the Native API technology for your add-ins. It is up to you what language you use for implementing the add-ins.

Once the add-in is ready, you can address to it from your 1C:Enterprise application's code.

Please refer to code samples in the articles that belong to the section mentioned above.